Compounding alternating-current circuits.



W. STANLEY.

COMPOUNDING ALTBRNATING CURRENT CIRCUITS.

APPLICATION FILED MAY 13, 1909.

946,829. Patented Jan 18,1910

I -I I I I I A x x x x x x L- l l l l l l 5 L6 Saturated -D Umazfz/razfa I IZZTJVE'SSEE/ IZVIIZ-E'NTDR WILLIAM STANLEY ZZZZZ' I AT T I To all whom it may concern:.

UNITED STATES PATENT OFFICE.

WILLIAM STANLEY, OF GREAT BARRINGTON, MASSACHUSETTS, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

COMPOUNDIN ALTERNATING-CURRENT CIRCUITS.

Be it known that I, WILLIAM STANLEY, a c1tizen of the United States, residin at Great Barrington, county of Berks ire, State of Massachusetts, have invented certain new and useful Im rove nents in Gompounding Alternatingurrent Circuits, of

' which the following is aspecification.

invention relates to voltage regulation of a ternating current circuits, and its ob-,

ject is to provide simple and efficient means for compounding the voltage of the circuit With varying load.

, My invention consists in employing two transformers having their primaries connected in series wit-h each other and in shunt to the source of voltage for the circuit, and their secondaries connected (in series with each other and with the load. In the para ticular embodiment of my invention which I have illustrated, the two transformer secondaries are also connected in series with the source of voltage for the circuit, so that the voltage of the load circuit is the resultant of the voltages generated by the source and the two transformer secondaries. The cores of the two transformers are so proportioned that one is saturated and the other unsaturated. The relative connections of the two transformers are reversed, so that their secondary voltages are in opposition; the secondary voltage of the. first transformer opposing the voltage of the source in the load circuit, and the secondary voltage of the second transformer assisting the voltage of the source. At no-load the secondary voltages are equal and opposite. As the circuit isloaded, the load current flowing through the transformer secondaries cannot a cot the magnetization of the saturated transformer, but increases the magnetization of the unsaturated transformer, and therefore increases the secondary yoltage, which is in a direction to add to the v ltage of the source, so as to increase the vollage supplied to the load. 1

My invention will bestbeunderstood by.

Specification of Letters Patent.

Application filed Kay 13, 1909. Serial No.'495,755.

B represents a generator for. supplying current to the circuit A.

Patented Jan. 18, 1910.

C and D represent two transformers, the primaries of which are connected in series witheach other and in shunt to. the generator' B, and the secondaries of which are connected in series with each other between the generator and the load-circuit A. The primary connections of the two transformers are relatively reversed, so that the secondary voltages are in 0 position in the load-circuit. The direction of current-flow at a iven instant in the circuit connections is indicated byarrowheads, and the direction of the induced secondary voltages in the two transformers by arrows. It will be seen that the secondary voltage of the saturated transformer C is in opposition to the current-flow, while the secondary voltage of the transformer D assists" the current-flow, or, in other words, is added to the voltage of the source. At no-loa'd the secondary voltages of the two transformers C and D are equal and opposite. As the load comes on the flow 0% current through the secondary of the sa urated transformer C cannot change its ma' etization, but in the transformer D pro uces an increase of magnetization Wl11C-h increases the secondary vol tage. Since this voltage is in series with that of the source, the resultant voltage supplied to the load is increased. Inthis manner the voltage drop in the generator, trans mission circuit, transformers, etc., is compensated for.

What I claim as new and desire to secure by Letters Patent of the United States, is:-

1. In combination with a load circuit and a' source of alternating current therefor, means for compounding the voltage supplied to the circuit under varying load comprising two transformers having, the r primaries connected in series with each other and in shunt to the source and their secondaries connected in series with each'ot-her and a with the load, the cores of the two transformers being so proportioned that one 1s saturated and the other unsaturated.

2. In combination 'with a circuit and a nected in series with each other and in shunt to the/source and their secondaries connected 'in series with each other-and with the load,

the cores ofthe two transformers being so proportioned that one is saturated and the other unsaturated, and the relative connections of the transformers being reversed so that their secondary voltages are in opposi- 5 tion.

3. In combination with a load-circuit and a source of alternating current therefor, means for compounding the voltage sup plied to the circuit under varying load com- 10 prising two transformers having their primaries connected in series with each other and in shunt to the source and their secondaries connected in series with each other and with the load, the cores of the two trans 15 formers being so proportioned that one is saturated and the other unsaturated, and the relative connections of the transformers being reversed so that their secondary voltages are in opposition, the secondary voltage of the saturated transformer o posin the voltage of the source in the loa circuit and the secondary voltage of the unsaturated transformer assisting the Volta e of the source.

In witness whereof, I'- ave hereunto set my hand this 6th day of May, 1909.

WILLIAM STANLEY.

Witnesses:

ENSIGN WoR'rHY, P. A. SMrrH. 

